Not sure what the purpose is of just duplicating questions. Or do you mean using an existing question as a basis or template for a new question? I get that and perhaps that needs to be a single step rather than a 'duplicate' first and then having to go in and edit. So maybe more of a 'create new from this question' that pre-populated the fields based on the question you were in?

I think this is more of I can copy a question, but I had a series I wanted to copy and edit and the edit would not stick when the question was saved. The answers were all the same for each question, it was the wording of the question that changed, so I did not want to copy and paste all of the info over and over, but I had to.